Fix typos prior to release

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/ssl_client.c b/library/ssl_client.c
index 0f0ea1d..2c4ce43 100644
--- a/library/ssl_client.c
+++ b/library/ssl_client.c
@@ -784,7 +784,7 @@
 
     /*
      * Generate the random bytes, except when responding to a verify request
-     * where we MUST reuse the previoulsy generated random bytes
+     * where we MUST reuse the previously generated random bytes
      * (RFC 6347 4.2.1).
      */
 #if defined(MBEDTLS_SSL_PROTO_DTLS)